Bluetooth headphones how to distinguish good Sound quality - factory

OEM Bluetooth headphones manufacturers teach you how to distinguish good sounds: the three elements of Bluetooth headphones to distinguish good sound quality.

The first element of the Bluetooth headphones: the distribution and control of the high, medium and low frequency bands.

This project is easy to understand, but it is also easy to misunderstand textual communication. how to say? Everyone will say: The treble of this pair of speakers is too strong and the bass is too little. This is the volume distribution of high, medium and low frequency bands. The problem is that if the bandwidth from 20Hz to 20KHz is divided into only three segments, it will inevitably produce "not precise enough" confusion. Where does your bass mean? How low is it? In order to make the description more accurate, it is necessary to subdivide the bandwidth of 20Hz-20kHz. According to the United States TAS and Stereophile's classification method is very simple, they subdivided each of the high, medium, and low into three sub-segments, that is, into "lower intermediate frequency, intermediate frequency, higher intermediate frequency" division method. This division is like the twelve equal law, quite regular. However, when applied to Chinese people, some minor translation problems have arisen. For example, do we call "lower mid-frequency" "mid-low frequency" or "low-mid frequency"? What about higher low frequencies? "High and low frequency"? With reference to the bandwidth of musical instruments and the name of the orchestra, the frequency of 20Hz-20KHz is divided into seven segments: extremely low frequency, low frequency, medium low frequency, intermediate frequency, medium high frequency, high frequency, and extremely high frequency. The nouns in these seven paragraphs are in line with the habitual names of ordinary Chinese people, and they are easy to remember and will not be confused. The octave of extremely low frequency from 20Hz-40Hz is called extremely low frequency. There are very few instruments in this frequency band, probably only instruments such as double bass, bass bassoon, tuba, pipe organ, and piano can reach such a low range. Since this extremely low frequency is not the most beautiful range of an instrument, composers rarely write notes that low. Unless it's pop music deliberately arranged with an electronic synthesizer, extremely low frequencies are really not very useful for headphone fans. Some people misunderstand one thing, saying that although the pitch of an instrument is not that low, the overtone can be as low as the pitch. In fact, this is not correct, because the fundamental tone of the instrument is the lowest note of that note, and the tone will only climb up by double, triple, quadruple, quintuple... etc., and there will be no downward note. It's like you tighten a string, the full-length vibration frequency of the string is the fundamental tone, and the vibrations of one-half, one-third, one-quarter, one-fifth...etc. string length are overtones. The addition of the fundamental tone and the overtone is the timbre of the instrument. In other words, even if the fundamental tone (pitch) of the violin and the flute are the same, the timbre will be different.

The second element of Bluetooth headset: tone

Tone color refers to the color of the sound. In English, tone quality (TONE QUALITY) and tone color (TIMBRE or TONE COLOR) are not the same thing at a glance. But in Chinese, sound quality and timbre are often mixed or misused. We often hear the saying that the sound of this violin is really cold, the sound of this violin is really warm, etc. This refers to the sound of the violin. Sound is colored like light, but it is not seen with the eyes, but heard with the ears. Generally, the warmer the tone, the softer the sound; the colder the tone, the harder the sound. Too soft or too hard is of course not very good. Sometimes, timbre can also be described by words such as "noble" and "beautiful". Basically, it is also one of nature. However, just like cloth, cloth quality refers to its material, and cloth color refers to its color. There are still clear boundaries between them. In the earphone equipment reviews, the tone color is just like the color, which refers to its unique color. The sound of some equipment is yellowish, some white, some cold, and you can even say it is blue with a little sadness. In short, audio headset equipment is like a musical instrument, almost inseparable from the fact that the more expensive the sound, the more beautiful it is. A two-million-dollar violin may have a beautiful golden timbre, while a five-thousand-dollar violin may look like a faded painting. Although everyone has different opinions, "beauty" still has a "consensus" that everyone recognizes. You can't say that a person with an upturned nose is the "incarnation of beauty." Similarly, you can't say that a device with a cool blue tone is beautiful. This is our consensus on the beauty of sound.

The third element of Bluetooth headset: sound quality

Sound quality refers to the quality of the sound. Many people confuse it with "timbre". What is the quality of sound? When you are talking about a pair of good quality shoes. You must mean fit, comfort, and durability, not that it is good-looking or fashionable. Similarly, when you are talking about the sound quality of a piece of audio headset equipment, you are not talking about its level and positioning, but specifically referring to the equipment as "tolerant to hearing"! It's as if it's not durable or fit. A piece of equipment with good sound quality is comfortable and durable. You don’t have to explore the reasons why it sounds comfortable and hard to hear. That’s a matter for experts. You just need to judge with your ears. Some equipment is vigorous, fast, and resolving, but it is not durable to listen. That may be a sound quality problem. A good audio equipment should have a sound quality like a good voice, which makes people never get tired of listening. Maybe I say that you still think it is very abstract. In fact, it is not, I can give another example to illustrate. When you mentioned fabric, you would say: The quality of this material is very good. When you are eating a steak, you will say: The quality of this steak is very good. When you are complimenting a child, you will say: This child has very good aptitude. Therefore, when you are listening to a piece of audio equipment or a musical instrument, you will also say: its sound quality is beautiful. From the above examples, you can clearly know that "quality" is the innate nature.